US Robotics ADSL Ethernet Modem Guida all'installazione

Chapter 1

U.S. Robotics ADSL Ethernet Modem

Overview

Description

The ADSL Ethernet modem provides home connectivity to an ADSL

service provider network over an Asynchronous Transfer Mode

(ATM)/ADSLphysical layer. It receives adaptive rates of up to

8Mbps downstream and transmits 640Kbps upstream.

System Features

This section introduces the system features of the ADSL Ethernet

modem.

Standards Compliance:

♦ITU-T G.992.1, G.992.2, and ANSI T1.413 Issue 2

♦Handshake Protocol: defined in ITU-TG.994.1

♦IEEE 802.3 10BaseT physical layer specification

Hardware Features

♦Discrete Multi-Tone based ADSL physical layer

♦Rate adaptive with maximum downstream data rates up to

8Mbps and upstream data rate up to 640Kbps.

♦10BaseT Ethernet interface, compliant with IEEE 802.3.

♦Status LEDs indicating Ethernet and ADSL activity

♦Restart and operate automatically after the input power is

restored from a power failure.

♦Management console support.

Software Features

Multiple data encapsulation formats support

♦RFC 2364 PPP over ATM AAL5

♦RFC 2516 PPP over Ethernet with third party client

♦RFC 1483 (bridge and routing mode) multi-protocol

encapsulation over ATM AAL5

♦RFC 1577 Classical IP and ARP over ATM

ATM support

♦ADSL physical connection supports ATM AAL5

♦Support for 8PVCs

♦End-to-end OAM loopback

Network Access

♦IP routing protocols: Static routing and RIPv1, v2

♦802.1d transparent bridging

♦DHCP server automatically assigns IP addresses to PCs on

the LAN

♦NAT enables multiple PCs on the LAN to access the Internet

via single public IP address

Network management

♦Web-based configuration software

♦TFTP firmware upgrade and configuration backup and

restore

♦TELNET server for remote management

♦SNMPv1 agent

♦MIBs support with RFC1213, RFC1493 (bridged mode only),

RFC1573, RFC2662

Security

♦password protected system management terminal

♦PAP/CHAP authentication for PPP mode

Environmental Constraints

This ADSL Ethernet modem should be operatedin an ambient

temperature environment of 0 to 50 degree C. The Ethernet modem

should be stored in an ambient temperature environment of –10 to

70 degree C and relative humidity in the range of 10% and 90%

non-condensing.

Chapter 2

Hardware Installation

Standard Shipment Contents

Contents

1 ADSL Ethernet modem

1 Installation Guide

1 Power Adapter (18 VAC)

1 RJ-11 Cable

1 Ethernet Cable

1 Installation CD

1 Registration Card

If you did not receive all of the items above, contact your service

provider or dealer.

Hardware Requirements

The following hardware is necessary to configure and use the ADSL

modem:

♦A 10/100 Ethernet Network Interface Card (NIC) installed on

your computer.

♦A PC with a Web browser, eitherInternet Explorer 4.0 or

above or Netscape 4.0 or above. (If you do not have the

required browser, visit http://www.microsoft.com/ or

http://www.netscape.com/ to download and update your

browser. While installing the software, you should enable

JAVA functionality for web-based configuration to work.)

♦A PC with communications software, such as HyperTerminal

in Win 95/98, for flash crash recovery.

♦For the management console port option, a PC equipped

with an available DB-9 or DB-25 serial port.

♦A line filter may be required for each telephone that will

share a line with the ADSL modem. Make sure there is no

filter installed between the ADSL modem and the phone wall

jack. Microfilters may be supplied by your DSL Internet

Service Provider.

Front Panel LEDs of ADSL Modem

LEDs Description

PWR The power LED is illuminated when power is applied to the

ADSL Router. Check your power adapter connection if the

LED is not illuminated.

ALM The alarm LED is illuminated when an error occurs.

LAN

It is illuminated when there is an Ethernet connection between

the ADSL router and your computer. It will be blinking when

there is Ethernet traffic. It will not be illuminated if an Ethernet

cable is not connected.

DSL It is illuminated when there is an ADSL connection. It will be

blinking when there is ADSL traffic. It will not be illuminated

when the ADSL cable is not connected or the ADSL

connection fails.

Note: All the LED’s will be illuminated for approximately 30 seconds

when you power on or reboot the ADSL modem.

Rear Panel Connectors of ADSL Modem

Connector LabelDescription

PWR Power Plug –connects to the power adapter.

LAN Ethernet Port –connects to the Ethernet port on

your PC or an Ethernet hub.

CONSOLE Management RS-232 Console Port –connects to

the serial port on your PC.

DSL ADSL Port –connects to the phone wall jack.

LAN Connector

The pin-out of the ADLS modem’s RJ-45 jack is the same as a

standard Ethernet UTP jack.

ADSL Connector

The RJ-11 jack of the Router uses pin 3 and pin 4.

Install the ADSL Ethernet Modem

1. Connect one end of the RJ-11 phone cord to the DSL port on the

rear of your ADSL modem. Connect the other end of the RJ-11

phone cord to your wall phone jack.

2. Connect one end of the Ethernet cable to the ENET port on the rear

of the ADSL modem. Connect the other end of the Ethernet cable to

the Ethernet port on the NIC in your computer.

Note: To connect the ADSL modem directly to a PC or to the uplink port

of a hub or router, use the Ethernet cable that was provided with

your ADSL modem. The Ethernet cable that came with your ADSL

modem is a straight-through UTP copper cable. To connect the

ADSL modem to a port other than the uplink port of a hub, a

crossover UTP cable must be used.

3. Plug the AC power adapter cord into the PWR jack at the rear of the

ADSL modem. Plug the AC power adapter into a standard wall

outlet. The ADSL modem is always supplied with power, so there is

no power switch to turn on. The PWR LED on the front panel of the

ADSL modem will be illuminated if power is being supplied to the

modem. If your computer is not on, turn it on now.

II. Verification of correct operation

Use the following procedures to verify the installation and operation of

the ADSL modem. Refer to the Troubleshooting section of this guide if

any problems occur.

1. Launch an Internet browser on the computer connected to the ADSL

modem.

2. Enter a URL of your choice or enter http://www.usr.com in your Web

browser.

3. Watch the DSL LED on the front of the ADSL modem blink as data is

transmitted or received. If the selected Web page comes up in the

Internet browser screen, the network connection is successfully

established.

Additional Options

Install External Micro-filter for the Telephone

In certain situations without a POTS splitter, transient noise from a

telephone can interfere with the operation of the ADSL modem and the

ADSL modem may introduce noise to the telephone line. To prevent this

from happening, a small external micro-filter must be connected to each

telephone.

ADSL Modem

Telephone

External POTS splitter

Voice

Data

Micro

filter

Chapter 3

Configuration Guide

Purpose

This chapter will provide the configuration steps for the ADSL modem.

The ADSL modem automatically trains up to the ideal line speed. By

default, the ADSL modem is provisioned with rates of 8 Mbps

downstream and 640 Kbps upstream. The maximum operative rate is

determined by your DSL service provider. After establishing a connection

between your ADSL modem and your DSL service provider, you will

have an always-on connection. There are logical connections that should

be set up upon initial configuration, which establish the virtual channel for

different applications. To configure the logical connections, you must

provision ATM virtual connections.

On the ADSL modem, the ADSL physical interface is always ready to

send and receive network traffic. You may need to define an ATM virtual

connection (VC) when communicating across an ATM network for logical

connection setup. The ATM connection is identified by two indicators:

virtual path identifiers (VPI) and virtual circuit identifiers (VCI). Each

connection must have a unique pair of VPI and VCI settings. Check with

your service provider for details.

Log on to the ADSL Modem

In order to configure the ADSL modem, open a Web browser and enter

the default IP address of http://192.168.1.1. The default password is

12345. No User Name is required. You must use the default password

the first time you log in, but you should change the password for your

ADSL modem after the first login. Refer to the Change Password

section for details.

Select the ADSL Protocol

The US Robotics ADSL Ethernet Modem supports the following four

different ADSL protocols:

•Multi-mode (default)

•G.DMT (G.992.1)

•G.Lite (G.992.2)

•ANSI T 1.413 Issue 2

When using the multi-mode setting, the ADSL Ethernet modem will

attempt to automatically determine which protocol is being used. In most

cases, the default setting of Multi-mode should not be changed. This

setting should only be changed if your service provider has specified that

a specific protocol should be used. To use a different ADSL Protocol,

select the appropriate button and click OK.

Note: After you click OK, you will be prompted to save your settings.

Click Save to save the changes you have made.

Configuring the Service Provider Settings

The ADSL modem supports four Service Provider WAN services:

•RFC1483 Bridged Mode (To be used as an Ethernet bridge)

•RFC1483 Routed Mode

•PPP over ATM (PPPoA) Mode

•PPP over Ethernet (PPPoE) Mode

A more detailed description of each connection mode follows.

Configure RFC1483 Bridged Mode

Select RFC1483 Bridged to use RFC1483 Bridged mode. Bridging is a

standardized layer 2 technology. It is typically used in corporate networks

to extend the physical reach of a single LAN segment and increase the

number of stations on the common LAN without compromising

performance. Bridged data is encapsulated using the RFC1483 protocol

to enable data transport.

One important characteristic of bridging is the number of bridge ports.

The ADSL modem has eight remote virtual ports on the ADSL interface

and one local port (Ethernet) on the user interface.

The ports on the ADSL interface are described as virtual because they

are associated with the ATM virtual connections that are configured on

the ADSL line. To establish a connection from any of the remote

destinations to the bridge port, PVCs must be configured end-to-end

through the network. Your DSL service provider will provide you with the

VPI/VCI values to use after you subscribe to the service.

The bridged mode comes with the following parameters:

Parameters Description

VPI Virtual path identifier

VCI Virtual circuit identifier

LLC Logical Link Control allows multiple protocol

running over one virtual circuit with a little bit more

overhead.

VCMUX Virtual Circuit Multiplexer (null encapsulation)

allows only one protocol running per virtual circuit

with less overhead.

Enable

NAPT This option is only for a routed connection and

cannot be used in bridged or PPPoE mode.

VPI/VCI

The ATM connection is identified by the two following indicators: virtual

path identifiers (VPI) and virtual circuit identifiers (VCI). Each connection

must have a unique pair of <VPI, VCI> settings.

RFC 1483 Bridged Setup

Create a new RFC1483 Bridged Connection

1. Enter the correct numbers in the VPI and VCI fields.

2. Select the appropriate encapsulation -LLC or VCMUX.

3. Click Add. This will create a new VPI/VCI connection. Up to 8

VPI/VCI connections can be set.

4. Click OK to save the settings.*

Modify a RFC1483 Bridged Connection

1. Select one VPI/VCI pair from the Connection List.

2. Modify the numbers in the VPI and VCI fields and select the

appropriate encapsulation -LLC or VCMUX.

3. Click Modify.

4. Click OK to save the settings.*

Delete a RFC1483 Bridged Connection

1. Select a VPI/VCI pair from the Connection List.

2. Click Delete.

3. Click OK to save the settings.*

Note: After you click OK, you will be prompted to save your settings.

Make sure you are finished making all your changes before you save

your settings. When you are finished making your changes, click Save.

Configure RFC1483 Routed Mode

Select RFC1483 Routed to use a RFC1483 Routed connection mode.

Routing is the act of moving information across a network from a source

to a destination. Along the way, at least one intermediate node is

typically encountered. Routing is often contrasted with bridging. The

primary difference between the two is that bridging occurs at Layer 2 (the

link layer) of the OSI reference model, whereas routing occurs at Layer 3

(the network layer).

The ADSL Modem has eight remote virtual ports on the ADSL interface

and one local port (Ethernet) on the user interface.

The ports on the ADSL interface are described as virtual because they

are associated with the ATM virtual connections configured on the ADSL

line. To establish a connection from any of the remote destinations to the

ADSL modem port, PVCs must be configured end-to-end through the

network.

RFC 1483 Routed Setup

Your DSL service provider will provide you with the values of VPI/VCI to

use after you sign up for the service.

Each PVC comes with the following parameters:

Parameters Description

VPI Virtual path identifier

VCI Virtual circuit identifier

WAN IP

Address Selected PVC's WAN IP address

WAN Subnet

Mask Selected PVC's WAN Subnet Mask

LLC Logical Link Control allows multiple protocol

running over one virtual circuit with a little bit more

overhead.

VCMUX Virtual Circuit Multiplexer (null encapsulation)

allows only one protocol running per virtual circuit

with less overhead.

Enable

NAPT Network Address Port Translation allows multiple

computers to share a single WAN IP Address

Check your ISP for the related IP information for the WAN connection

including WAN IP, WAN Subnet Mask, and Default Gateway.

To set the VPI/VCI/WAN IP/WAN Subnet Mask parameters, including

adding, modifying, and deleting, refer to the "Set up VPI/VCI " section in

this manual.

Create a new RFC1483 Routed Connection

1. Enter the correct numbers in the VPI and VCI fields.

2. Select the appropriate encapsulation -LLC or VCMUX.

3. Select Enable NAPT if an Internet connection will be shared

among multiple computers.

4. Enter the WAN IP address and the WAN subnet mask.

5. Click Add. This will create a new VPI/VCI connection. Up to

eight VPI/VCI connections can be set.

6. Click OK to save the settings.*

Note: If you are setting the NAPT inbound server, please refer to the

LAN Settingssection of this manual for more configuration instructions.

Modify a RFC1483 Routed Connection

1. Select one VPI/VCI pair from the Connection List.

2. Modify the numbers in the VPI and VCI fields and select the

appropriate encapsulation -LLC or VCMUX.

3. Select Enable NAPT if an Internet connection will be shared

among multiple computers.

4. Enter the WAN IP address and the WAN subnet mask.

5. Click Modify.

6. Click OK to save the settings.*

Delete a RFC1483 Bridged Connection

1. Select a VPI/VCI pair from the Connection List.

2. Click Delete.

3. Click OK to save the settings.*

Note: After you click OK, you will be prompted to save your settings.

Make sure you are finished making all your changes before you save

your settings. When you are finished making your changes, click Save.

Configure PPPoA Mode

Click the PPPoA button to use PPP over ATM connection mode. PPP is

a single link or multi-link interface between two packet switching devices,

such as a router or bridge. PPP is an efficient conduit for multiple

protocols such as IP and IPX, which are encapsulated across the

communications datalink. PPP over ATM is PPP frames that are carried

over ATM cells, which are the common transport and backbone used by

DSL service providers.

Your service provider, usually the telephone company or the ISP, will tell

you the values of VPI/VCI to use after you sign up the service. Your

service provider must also provide your User name, Password, and

Authentication protocol. To set the VPI/VCI parameters including adding,

modifying, and deleting, refer to "Set up VPI/VCI " in this manual.

The following are the required settings for a PPPoA connection:

Parameters Description

VPI Virtual path identifier

VCI Virtual circuit identifier

User name User name assigned or verified by your service

provider.

Password

The password that will allow login in conjunction

with your user name.

LLC Logical Link Control allows multiple protocol

running over one virtual circuit with a little bit more

overhead.

VCMUX Virtual Circuit Multiplexer (null encapsulation)

allows only one protocol running per virtual circuit

with less overhead.

Enable

NAPT Network Address Port Translation allows multiple

computers to share a single WAN IP Address

CHAP Challenge Handshake Access Protocol encrypts

the password through a DES/MD5 algorithm which

provides more security.

PAP Use Plain-text As Password format for a lesser

security.

Create a new PPPoA Connection

1. Enter the correct numbers in the VPI and VCI fields.

2. Select the appropriate encapsulation -LLC or VCMUX.

3. Select Enable NAPT if an Internet connection will be shared

among multiple computers.

4. Enter the User name, Password and Authentication –CHAP

or PAP.

5. Click Add. This will create a new VPI/VCI connection. Up to

eight VPI/VCI connections can be set.

6. Click OK to save the settings.*

Note: If you are setting the NAPT inbound server, please refer to the

LAN Settingssection of this manual for more configuration instructions.

Modify a PPPoA Connection

1. Select one VPI/VCI pair from the Connection List.

2. Modify the numbers in the VPI and VCI fields and select the

appropriate encapsulation -LLC or VCMUX.

3. Select Enable NAPT if an Internet connection will be shared

among multiple computers.

4. Enter the User name, Password and Authentication –CHAP

or PAP.

5. Click Modify.

6. Click OK to save the settings.*

Delete a PPPoA Connection

1. Select a VPI/VCI pair from the Connection List.

2. Click Delete.

3. Click OK to save the settings.*

Note: After you click OK, you will be prompted to save your settings.

Make sure you are finished making all your changes before you save

your settings. When you are finished making your changes, click Save.

Configure PPPoE Mode

Click the PPPoE button to use PPP over Ethernet connection mode.

PPP is a single link or multi-link interface between two packet switching

devices, such as a router or bridge. PPP is an efficient conduit for

multiple protocols such as IP and IPX, which are encapsulated across

the communications datalink. PPP over Ethernet is PPP frames that are

carried over standard 802.3 Ethernet frames over ATM.

Your service provider, usually the telephone company or the ISP, will tell

you the values of VPI/VCI to use after you sign up the service. Your

service provider must also provide your User name, Password, and

Authentication protocol. To set the VPI/VCI parameters including adding,

modifying, and deleting, refer to "Set up VPI/VCI " in this manual.

The following are the required settings for a PPPoE connection:

Parameters Description

VPI Virtual path identifier

VCI Virtual circuit identifier

User name User name assigned or verified by your service

provider.

Password The password that will allow login in conjunction

with your user name.

LLC Logical Link Control allows multiple protocol

running over one virtual circuit with a little bit

more overhead.

VCMUX Virtual Circuit Multiplexer (null encapsulation)

allows only one protocol running per virtual

circuit with less overhead.

Enable NAPT Network Address Port Translation allows

multiple computers to share a single WAN IP

Address

CHAP Challenge Handshake Access Protocol encrypts

the password through a DES/MD5 algorithm

which provides more security.

PAP Use Plain-text As Password format for a lesser

security.

Create a new PPPoE Connection

1. Enter the correct numbers in the VPI and VCI fields.

2. Select the appropriate encapsulation -LLC or VCMUX.

3. Select Enable NAPT if an Internet connection will be shared

among multiple computers.

4. Enter the User name, Password and Authentication –CHAP

or PAP.

5. Click Add. This will create a new VPI/VCI connection. Up to

eight VPI/VCI connections can be set.

6. Click OK to save the settings.*

Note: If you are setting the NAPT inbound server, please refer to the

LAN Settingssection of this manual for more configuration instructions.

Modify a PPPoE Connection

1. Select one VPI/VCI pair from the Connection List.

2. Modify the numbers in the VPI and VCI fields and select the

appropriate encapsulation -LLC or VCMUX.

3. Select Enable NAPT if an Internet connection will be shared

among multiple computers.

4. Enter the User name, Password and Authentication –CHAP

or PAP.

5. Click Modify.

6. Click OK to save the settings.*

Delete a PPPoE Connection

1. Select a VPI/VCI pair from the Connection List.

2. Click Delete.

3. Click OK to save the settings.*

Note: After you click OK, you will be prompted to save your settings.

Make sure you are finished making all your changes before you save

your settings. When you are finished making your changes, click Save.

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